FD, FC and FDC values

Hello Mrtrix experts,

Thank you so much for your availability and for this incredible community that is keeping us updated for all news !!!

I’m a FBA beginner. I compute all steps without problem according to the tutorial of FBA, the link is down below: Fibre density and cross-section - Single-tissue CSD — MRtrix 3.0 documentation.
I would really appreciate your help regarding the steps to obtain FD, FC and FDC values. First in the whole brain tractography analyses and second in tract of interest ?
Could you please share the main steps (line command) that are used the most ?

Many thanks in advance for your time,
Best regards,


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Hi Jennifer

Check out Steven Meisler’s work (GitHub - smeisler/Meisler_Reading_FBA: Code used in the Meisler and Gabrieli 2022 eLife paper on fixel based analyses of reading abilities.) and bash scripts (https://github.com/smeisler/Meisler_Reading_FBA/tree/main/fba/bash_scripts). Read his article for more background and details: Fiber-specific structural properties relate to reading skills in children and adolescents | eLife

Good luck


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Hi William,

Many thanks for your reply.
It is really helping now i can continue with my analyses.

Best wishes,